Gwent's Police and Crime Commissioner and Gwent Police's former chief constable will appear before the Home Affairs Select Committee in London later.
Both parties will give their side of events that led to Mrs Napier's departure at the meeting in Westminister this afternoon.
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First Minister Carwyn Jones says Wales must not get a bad deal in Brexit negotiations. He was speaking at meeting of British-Irish Council.
Isolated showers may last into the late evening, but a dry night.
Expensive lingerie worth more than £100 were bought fraudulently on one of its credit cards, says Welsh Government.